A refrigerant control valve apparatus which maintains improved sealing ability while being restrained from being enlarged includes a housing including a first discharge port and a second discharge port which includes a smaller diameter than the first discharge port, a rotor rotatably housed at the housing, a bore portion provided at an outer wall portion of the rotor to control a flow of refrigerant relative to the first discharge port and the second discharge port, a second seal portion of the second discharge port being configured to make contact with an edge portion of the bore portion in a case where the rotor is specified at any rotation position for sending out the refrigerant to the second discharge port.

Various internally heated valves are disclosed. The internally heated valve can include a heater sleeve within a valve body. The heater sleeve can be electrically heated. The heater sleeve can heat fluid passing through the valve body.

A structure and method for fastening a ball seat for a ball valve, a trunnion ball valve, and a hydrogen station using the ball valve, in which a stepped part is positioned medially in each of inner and outer peripheral surfaces of a resin-made annular seat body, with a seat part on a tip side and a holding part on a rear end side; an attachment groove defined by inner and outer cylinders having a ring-shaped swaging edge part at a tip of a seat retainer; the holding part being attached to the attachment groove; and the swaging edge part of the inner and outer cylinders being in contact with and fixed by being swaged to the stepped part so as to cause the seat part to protrude farther than a swaging position.

A ball valve is provided. The ball valve includes a housing, a ball seat arranged in the housing, a ball member mounted within the housing and being rotatable relative to the ball seat between open and closed positions, the ball seat and ball member defining respective through bores, the ball member including a sealing surface, a bore surface and a leading edge surface extending between the sealing surface and the bore surface, the leading edge surface being configured to cut a body extending at least partially through the valve upon closure of the ball member, wherein said leading edge surface is truncated. The ball member may include a relief region proximate the leading edge surface.

Disclosed is a coolant control valve unit having a sealing structure, the control valve unit including: a rotary valve provided with a valve coolant passage formed from an inner surface to an outer surface of the rotary valve; a valve housing in which the rotary valve is rotatably provided; a fitting coupled to the valve housing, and having a fitting coolant passage; and a sealing unit provided between a front surface of the fitting and the outer surface of the rotary valve, wherein the sealing unit includes: a sealing ring being in contact with the outer surface of the rotary valve; and a rubber ring provided on the front surface of the fitting, and bringing the sealing ring into contact with the outer surface of the rotary valve, wherein the rubber ring has an X-shaped cross-section, with a front groove, a rear groove, an inner groove, and an outer groove.

A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening 2 is smaller than a diameter of the valve opening 1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

A ball valve has a valve housing (10), a lock chamber (12), a ball plug (22) rotatably mounted in the lock chamber (12), at least one main channel inflow section (18a), at least one main channel outflow section (18b), main channel sealing elements (28a, 28b), and additional sealing elements (30a, 30b, 30a, 30b). The ball plug has a through opening (24) oriented transversely to the axis of rotation and is rotatably arranged via an actuator (26) so that the ball plug (22) can be brought into at least one open position and into at least one closed position. A monitoring chamber (32) sealed in the closed position of the ball plug (22) is formed within the lock chamber (12) for monitoring proper functioning of the main channel sealing elements (28a, 28b).

A ceramic lined valve comprising: i) a valve body (20) having an end connection (50) for coupling the valve in fluidic communication with a fluid flow conduit; v) a flow control member (22) within the valve body; characterized in that the ceramic lined valve further comprising: vi) a lining (30) within the valve body comprising a single piece of ceramic, wherein the lining extends from the flow control. member to the end connection, the lining defining a valve seat abutting the flow control member, and vii) a ceramic covering (40) forming a coupling face of the end connection, separate from and juxtaposed to the lining.

A top entry ball valve comprises a housing with a central cavity communicating with two bores which define a flow path through the housing. A ball valve element is provided and comprises a through bore. The ball valve element is rotatably mounted within the central cavity for rotation about an axis for selectively aligning the through bore with the housing bores. The ball valve element further comprises first and second flat surfaces on opposite sides of the ball valve element. The flat surfaces are perpendicular to the axis. The top entry ball valve further comprises first and second seats which are configured to provide a seal between the ball valve element and the central cavity. First and second protective rings are provided for receiving and supporting at least a portion of the first and second seats.

A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening 2 is smaller than a diameter of the valve opening 1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.